System A has two processors, Program X takes 10 seconds to execute on one of the processors. Program Y takes 10 seconds to execute in parallel on the other processor. System B has a single processor that can execute only one problem at a time. Program X takes 6 seconds to execute on this processor. WHich system would you oick if you cared about overall system througjput?

System A has two processors, Program X takes 10 seconds to execute on one of the processors. Program Y takes 10 seconds to execute in parallel on the other processor. System B has a single processor that can execute only one problem at a time. Program X takes 6 seconds to execute on this processor. WHich system would you oick if you cared about overall system througjput?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter4: Processor Technology And Architecture

Section: Chapter Questions

Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...

See similar textbooks

Similar questions

If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the fetch cycle is 40% of the processor cycle time, what memory access speed is required to implement load operations with zero wait states and load operations with two wait states?
System A has two processors, and Program X takes 10 seconds to run on one of them. Program Y executes in parallel on the other CPU in 10 seconds. System B is powered by a single CPU that can only handle one problem at a time. On this CPU, Program X takes 6 seconds to execute. Which system would you choose if overall system throughput was important to you?
Consider a system that has multiple processors where each processor has its own cache, but main memory is shared among all processors.q.) Which cache write policy would you use?
Suppose your company has decided that it needs to make certain busy servers 50% faster. Processes in the workload spend 60% of their time using the CPU and 40% on I/O. In order to achieve an overall system speedup of 25%:Q.) How much faster does the CPU need to be?
Assume a 3GHz processor executes three classes of instructions(A, B, C).i. Calculate the average CPI for this sequence of program.ii. Calculate the execution time for this sequence of program.iii. If we use a system with four same processors, there will bespeed up by a factor of 4 for classes A and C, but class B willremain unaffected. Calculate the new execution time for thissystem. What is the overall speed up? Class A B C CPI for class 4 2 10 IC in sequence 100 200 300
How would it be advantageous to prioritize the I/O queue above the process execution queue? What will happen if the I/O is interrupted is anyone's guess. Indications are conflicting as to how this could effect the maximum burst rate of the CPU. I'm confused as to the nature of your question.
How would it be advantageous to prioritize the I/O queue above the process execution queue? If the I/O connection fails, who knows what will occur. No one knows how this could effect the CPU's maximum burst rate. I'm confused as to the nature of your question.
You have a program where 30% of its execution time is inherently sequential. The remaining 70% consists of 20 parallel threads. On a single core processor it takes 100 seconds to run. (i) What is the minimum time that it could take on a system with 8 cores? Explain and justify your answer. (ii) Give 3 reasons why, in practice, you might not reach this theoretical speedup. Justify your answers.
2) If 278 tasks are serial and 1000 are parallel, what should be the speedup if we use 166 processors compared to if we use 48 processors?
To support parallel execution, we need? a. Exactly one processor (core) b. At least two processors (cores) c. At least three processor (cores) d. It does not matter how many processor (core) we have
Your favorite computer program (after being converted to MIPS assembly code, then to machine code) results in 2.5e8 instructions. Consider the three different CPUs and their clock rates and CPIs and determine how much time it would take each of them to execute this program. Your computer with a clock rate of (use task manager on your computer, find the clock rate of your computer and write it here: _____) and a CPI of 1.2
a) Suppose two threads T1 and T2 are running concurrently in the same process with a single CPU. Suppose T1 does “Load X into register R1” machine instruction. Then the CPU scheduler switches the CPU to T2. Will T2 see the same vaue of R1 as loaded here by T1? (YES or NO)? Explain in less than 50 words. Be specific. (b) Suppose two threads T1 and T2 are running concurrently in the same process with a single CPU. Is it possible to have a moment (time instant) where both threads have made a request to Memory Unit to read some data (ex. as part of a “Load … into register …” instruction) and Memory Unit has not yet completed either of these two requests? Explain in less than 50 words.